Re: 15 week old very fussy at the breast
I'd blame the distractibility. I think that sometimes a baby gets interested in something across the room, or her own toes, or whatever, pulls off the breast- and then is like "Hey, WTH just happened? Where's my milk? Waaaah!" But since your baby just had a cold, an ear infection could be causing the behavior. And it could also be a reaction to a change in flow- sometimes a baby will get cranky when the milk isn't coming out at her preferred speed.
I think the way you deal with this is first to keep a careful eye on diaper output. If that's normal, no need for bottles or excessive worry. And if it's normal but baby gets increasingly fussy, then you see the doctor and have someone take a peak in her ears.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"